\begin{equation}
	\begin{aligned}
		x = & x^2 \mqty[a_{11} & a_{12} \\ a_{21} & a_{22}] =& f(x) \\
		y = & f(y) =           & y^2    \\
		z = & f(z) =           & z^2
	\end{aligned}
\end{equation}
